Search In this Thesis
   Search In this Thesis  
العنوان
STATIC-BED ELECTROLYSIS FOR PRODUCTION OF
ULTRA-FINE COPPER POWDER from COPPER CABLES SCRAP /
المؤلف
Mahmoud, Karima Fathy Ali.
هيئة الاعداد
باحث / كريمة فتحى محمود
مشرف / عاشور عبدالمجيد على
مشرف / محمد عبدالهادى جبريل
مشرف / عصام احمد على
الموضوع
Static-bed electrolysis. low quality copper cables scrap. electrolytic powder.
تاريخ النشر
2021.
عدد الصفحات
i-vii, 105 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة
تاريخ الإجازة
1/11/2021
مكان الإجازة
جامعة السويس - المكتبة المركزية - هندسة الفلزات والمواد
الفهرس
Only 14 pages are availabe for public view

from 89

from 89

Abstract

This work aims to investigate experimentally the different parameters affecting the production of electrolytic copper powder from copper cables scrap anode particles using static-bed electrolysis technique. This technique depends mainly on cutting the longest cables scrap (manually) and put them in a metal basket made from titanium. Two cathodes are made of stainless steel sheets with the anode basket were submerged in acidic solution, containing H2SO4 and copper sulfate with organic agent. The experimental runs have been carried out at temperatures of 04-60 °C, stirring rates of 044-044 rpm, current densities of 044-0044 A/m2, copper ions in the electrolyte at 5-15 g/l, sulfuric acid concentrations at 100-300 g/l, adding organic agent of polyvinylpyrrolidone 2 g/l and the state of electrolyte (old - new). The effect of different parameters on the electrolysis process were studied and evaluated.- The optimum electrolysis process conditions to produce the finest particle size ( about 100 μm), were obtained at: current density = 1200 A/m2, stirring rate = 200 rpm, T = 50 °C, copper ions concentration in the electrolyte = 10 g/l, sulfuric acid concentration in electrolyte = 100 g/l, organic additive (PVP) = 2 g/l and 4 cm anode-cathode distance Electrolytic copper powder was obtained in dendritic and dispersed shapes with purity up to 99.938% Cu and apparent density from 1.544 to 4.080 gm/cm3. The electrolysis process was accomplished with cathodic current efficiency reached to 100 %, specific energy demand was between 1.184 and 2.96 kwh/kg Cu and powder productivity reached to 1.188 g/A.h.